Canon characters listed below are linked to the main article about them. Non-canon characters are not linked, but those that recurred, appearing or being mentioned in more than one story, are defined further in DC TOS volume 2 characters.

Doctor on McCoy's staff aboard Enterprise who reported the Klingon defense officer's desire to speak with Kirk and Spock.

qul HoH defense officer

Klingon officer who reported that his station had been sabotaged, and that only himself, a deceased subordinate, or Keydn, could have done so.

Needran leader

Leader of the people of Needra.

Lafayette helmsman

Dark-skinned Starfleet officer seated at the helm position on the bridge of Lafayette. This officer wore a deep blue turtleneck collar, indicating some sort of military specialty. He was apparently wounded or killed in the Tyrion attack.

Lafayette navigator

Starfleet officer who wore a thick red visor while sitting at the navigation post on the Lafayette bridge. The visor was drawn similarly to that of Cyclops of the X-Men comics, whom this man resembled.

Lafayette bridge officer

Starfleet officer, with a gray turtleneck collar, who announced the alien vessel fire to Captain Anderson, while helping a yellow-skinned medical officer back to his feet.

Yellow-skinned Lafayette medical crewman

Alien medic stationed on the Lafayette bridge.

Green-skinned Lafayette medical crewman

Alien medic stationed on the Lafayette bridge, who rushed around with a medikit helping wounded.

Enterprise pilot

Dark-skinned officer, wearing the uniform of a navigator, who sat at the helm console aboard the Enterprise-A. He appeared to be wearing the insignia of either a commander or lieutenant commander.

Blue-skinned Enterprise crewman

Alien crewman, wearing a military dark-blue turtleneck collar, stationed on the Enterprise-A bridge.